<!DOCTYPE html>
<html lang="zh">

<head>
    <title></title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://unpkg.com/vue/dist/vue.js"></script>
    <link href="../css/style.css" rel="stylesheet"> </head>

<body>
<div id="myApp">
    <p>今年3月3日发卖的任天堂新一代主机Switch的价格是：{{price}}円，含税价格为：{{priceInTax}}円，折合人民币为：{{priceChinaRMB}}元。</p>
    <button @click="btnClick(10000)">加价10000円</button>
</div>
<script>
    var myApp = new Vue({
        el: '#myApp',
        data: {
            price: 0,
            priceInTax: 0,
            priceChinaRMB: 0,
        },
        watch: {
            price: function(newVal, oldVal){
                console.log(newVal, oldVal);
                this.priceInTax = Math.round(this.price * 1.08);
                this.priceChinaRMB = Math.round(this.priceInTax / 16.75);
            },
        },
        methods: {
            btnClick: function(newPrice){
                this.price += newPrice;
            },
        },
    });
    myApp.price = 29980;
</script>
</body>

</html>